This game successfully meets the requirements of the brief and an effort has been made her. The hold down to jump higher is a very nice implementation that allows much more freedom into the character's movement.
I think that the movement could use some work, however, as it feels incredibly floaty at times with an unusually fast fall speed in comparison with the jump speed. In addition, you can just hold space and fly off screen which definitely feels like an oversight. Finally, consider how you export the game, is this the best way to do so?
All in all, an attempt has been made which is more than sufficient for the task at hand, but some more polish would go a long way to improving user experience.